Change in Financial Statement due to adoption of Policy (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Item Effected [Line Items]
Net Cash Provided By Used In Operating Activities	$ 342.7	$ 889.0
Net Cash Provided By Used In Financing Activities	$ 1,896.7	(915.0)
As Previously Reported [Member]
Item Effected [Line Items]
Net Cash Provided By Used In Operating Activities		856.6
Net Cash Provided By Used In Financing Activities		(882.6)
Adoption Adjustment [Member]
Item Effected [Line Items]
Net Cash Provided By Used In Operating Activities		32.4
Net Cash Provided By Used In Financing Activities		$ (32.4)